AbstractWe find the group of symmetry transformations generated by interacting fluids in spatially flat Friedmann–Robertson–Walker (FRW) spacetime which links cosmologies with the same scale factor (identity) or with scale factors a and a−1 (duality). There exists a duality between contracting and superaccelerated expanding scenarios associated with (phantom) cosmologies. We investigate the action of this symmetry group on self-interacting minimally (conformally) coupled quintessence and k-essence cosmologies
The general relativistic cosmological Friedmann equations that describe how the scale factor of the ...
We investigate a mechanism that generates exact solutions of scalar field cosmologies in a unified w...
We consider multidimensional cosmologies in even-dimensional space-times (D=2n) containg perfect flu...
AbstractWe find the group of symmetry transformations generated by interacting fluids in spatially f...
We find the group of symmetry transformations generated by interacting fluids in spatially flat Frie...
AbstractWe provide a detailed description for power-law scaling Friedmann–Robertson–Walker cosmologi...
We show that Einstein's field equations for spatially flat Friedmann–Robertson–Walker (FRW) spacetim...
A duality transformation that interrelates expanding and contracting cosmological models is shown to...
We implement a conformal time scale factor duality for Friedmann-Robertson-Walker cosmological model...
We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional ...
We illustrate how form-invariance transformations can be used for constructing phantom cosmologies f...
12 pages, 1 figure12 pages, 1 figure12 pages, 1 figureWe provide a simple mathematical description o...
We illustrate how form-invariance transformations can be used for constructing phantom cosmologies f...
We investigate homogeneous and isotropic oscillating cosmologies with multiple fluid components. Tra...
We study the general chaotic features of dynamics of the phantom field modelled in terms of a single...
The general relativistic cosmological Friedmann equations that describe how the scale factor of the ...
We investigate a mechanism that generates exact solutions of scalar field cosmologies in a unified w...
We consider multidimensional cosmologies in even-dimensional space-times (D=2n) containg perfect flu...
AbstractWe find the group of symmetry transformations generated by interacting fluids in spatially f...
We find the group of symmetry transformations generated by interacting fluids in spatially flat Frie...
AbstractWe provide a detailed description for power-law scaling Friedmann–Robertson–Walker cosmologi...
We show that Einstein's field equations for spatially flat Friedmann–Robertson–Walker (FRW) spacetim...
A duality transformation that interrelates expanding and contracting cosmological models is shown to...
We implement a conformal time scale factor duality for Friedmann-Robertson-Walker cosmological model...
We illustrate how a group of symmetry transformations, which preserve the form of the n-dimensional ...
We illustrate how form-invariance transformations can be used for constructing phantom cosmologies f...
12 pages, 1 figure12 pages, 1 figure12 pages, 1 figureWe provide a simple mathematical description o...
We illustrate how form-invariance transformations can be used for constructing phantom cosmologies f...
We investigate homogeneous and isotropic oscillating cosmologies with multiple fluid components. Tra...
We study the general chaotic features of dynamics of the phantom field modelled in terms of a single...
The general relativistic cosmological Friedmann equations that describe how the scale factor of the ...
We investigate a mechanism that generates exact solutions of scalar field cosmologies in a unified w...
We consider multidimensional cosmologies in even-dimensional space-times (D=2n) containg perfect flu...